Sampling is the method of collectingparticipants for your research
A target population is a group of people that the researcher wishes to apply the findings of the experiment to (they have a trait that is of interest to the researcher)
A sample is a group of people from the target population who will participate in the research
A representative sample is when a sample is an accuratereflection of the target population. It can be considered representative and therefore the findings are generalisable to the target population